package com.ccc.utils;

import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;

@Component
public class RedisIdWorker {
    private static final long BEGIN_TIMESTAMP = 1640995200L;
    private static final int COUNT_BIT = 32;

    @Resource
    private StringRedisTemplate stringRedisTemplate;

    //生成时间戳
    public Long nextId(String keyPrefix) {
    LocalDateTime now = LocalDateTime.now();
    long timestamp = now.toEpochSecond(ZoneOffset.UTC) - BEGIN_TIMESTAMP;
        String date = now.format(DateTimeFormatter.ofPattern("yyyy:MM:dd"));

        //生成序列号
        long count = stringRedisTemplate.opsForValue().increment("icr:" + keyPrefix + ":" + date);
        return timestamp << COUNT_BIT | count;
    }

}
